Folding typewriting machine



L. B. BRIDGES.

FOLDING TYPEWRITFNG MACHINE.

APPLICATION FILED MAR. 10, I919.

w n W. 1. Y m. R E mam v w w N A H d8 64 t a P L. B. BRIDGES.

FOLDING TYPEWRITING MACHINE.

APPLICATION FILED MAR. I0, 1919.

Patented Nov. 7,1922.

Laws,

4 SHEETSSHEEI 2.

INVENTOR 4 6, 4%, BY

ATTORN EYS L. B. BRIDGES.

FOLDING TYPEWRITING MACHINE.

APPLICATION HLED MAR.10, 1919.

Patented Nov. 7, 1922-.

4 SHEETS-SHEET 3 INVENTOR ATTORN BY 5 L. B. BRIDGES.

FOLDING -TYPEWRIT|NG MACHINE.

APPLICATION man MAR. 10, 1919.

1,434,733 Patented Nov. 7, 1922.

4 SHEETSSHEET 4.

llllillll Hum-v INVENTOR ATTORNEYS Patented Nov, 7, 1922.

oirao 15;;-

LEWIS B. BRIDGES, OF NEW- YORK, N. Y. ASSIGNOR TO CORONA TYPEWRITER COM-EANY, INQ, OF GROTON, NEW YORK, A CORPORATION OF NIENV YORK.

FOLDING TYPEWRITING IJIAGHINE.

Application filed March -10, 1919. Serial No. 281,631.

T all whom itmag concern:

Be it known that I, Lnwrs B. Bnrnon s, a

l citizen of the United States, and resident of new and usefulImprovements in Folding Typewriting Machines, of which the following isa specification.

One of the objects of this invention is to provide a folding typewritingmachine having the appearance of a large standard machine. whenextended, and so constructed that the cubical dimensions thereof may bereduced approximately 50%. when the machine is folded and in which theparts are folded in such manner as to maintain the type basket,carriage, ribbon mechanism, escapement mechanism, and universal barmechanism in upright positions at all times, and to adapt the machinewhen folded to fit in an elongated rectangular case with the base of themachine resting on the bottom of the case, thus permitting the machineto be conveniently, carried when folded with the major portion thereofand the principal mechanisms in an upright position.

A further object of the invention is to provide a typewriting machinehaving a main frame part supporting; the type basket, and a keyboardfoldable from a normal horizontal position upwardly and rearwardly to avertical position within the forward portion of the main frame part, insuch a way as to reduce the length of the machine without 5 increasingthe height thereof, and having a horizontally movable frame partoperable by the keyboard frame part to move the platen carriage,escapement mechanism, rib bon mechanism, and universal bar forwardlyhorizontally from a normal rearwardly ex- V tended position to a compactposition over the main frame part, the. ribbon spools moving forwardlyclose to and in front of the lower or forward part of the kevboard andoverlying the higher or rear part of the keyboard, and the carriage anduniversal bar moving forwardly to a compact position over the type barsand in closer relation with the keyboard, thus further reducing thelength of the machine without increasing its height.

Another important object of the invention is to provide a typewritingmachine having a foldable key action so constructed that the keyboardmay be folded from its normal horizontal position to a vertical positionwith a portion of the keyboard forward of the type-bar rest and aportion of the keyboard below the typebar rest, whereby the length ofthe machine from front'to rear may be reduced to aminimum when the machne is collapsed without increasing the height of the machine.

Further highly important objects of the inventlon are to provide atypewriting machine having a foldable type-bar actionso constructed thatthe keyboard may be folded to a vertical position in compact relationwith the type basket without increasing the height of the machine, toprovide a type-bar action foldable as set forth, in which positivemechanical connections are maintained at all times between the keys andthe type bars, and to provide a type-bar action foldable as set forth soconstructed as to obtain a uniform key touch.

In the drawings Fig. 1 is a vertical sectional view of the machine inits normal extended operative position;

.Fig. 2 a similar view showing the machine compacted;

'Fig. 3 a fragmentary vertical transverse sectional view;

Fig. 4C a fragmentary plan view:

1 Fig. 5 a detail view showing part of the case shift mechanism;

Fig. 6. a detail vertical section showing the space bar mechanism;

Fig. '7 a detail side elevation showing part of the case shiftmechanism; and

Fig. 8 a view showing the different forms of printing key stems.

The main or relatively stationary frame part is formed with side walls 1and a rear wall 2. the side and rear walls being cut away as shown, andthe front of said frame part being open. The higher partsof the sidewalls 1 at the front of the machine are connected by a top or finishingplate 3, and said side walls are also connect-ed adjacent their loweredges by a transverse plate or bar 4.

An upwardly and rearwardly foldable keyboard frame part 5, substantiallyU- shaped in plan view, is pivotally held to the side walls 1 by bolts 6which pass through the side walls 1 at points closely adjacent thebottom of the machine frame. Clamping or thumb nuts 7 are threaded onthe outer ends of bolts 6 and serve when tightened to lock the keyboardframe part 5 in either its normal horizontal position or its foldedvertical position. The relatively stationary mainframe part ispreferably provided with rubber feet 8 at each corner thereof. Thekeyboard frame part is preferably provided with two rubber feet 9 at thefront corners thereof, and the side walls of the keyboard frame part arepreferably formed with lugs 5 adapted to engage plate 4 when thekeyboard frame part is folded, to arrest said frame part in the positionshown in Fig. 2.

The printing keys 10 are arranged in three rows or banks and aresupported on the upper ends of three rows of key stems 11, 12 and 13.The lower portions of the key stems of all three rows are arranged inalignment transversely of the keyboard frame part and extend vertically.The upper portion of each key stem 11 extends upwardly and rearwa'rdly,the upper portion of each key stem 12 extends vertically and is offsetslightly forwardly of the lower portion thereof, and the upper portionof each key stem 13 extends forwardly and upwardly from the lowervertically disposed portion thereof. The key stems are supported on theforward ends of two series of superposed parallel rows of leversextending fore and aft of the keyboard frame part. The levers 14 of onerow are pivotally supported intermediate their ends on a common fulcrumrod or wire 15 and extend through kerfs in a bar 16 held to the keyboardframe part. The levers 17 of the lower row extend through kerfs in bar16 and are pivotally supported on a common fulcrum wire or rod 18. Thevertical portion of each key stem is connected by pivot pins 19 and 20with the forward ends of two superposed levers 14 and 17 and the rearends of each pair of superposed levers 14 and 17 are connected by one ofa series of vertical links 21 arranged in alignment transversely of thekeyboard frame part. A series of coil springs 22., held to the frontcross-bar of the keyboard frame part at their forward ends and held tolugs 23 on levers 17 at their rear ends, serve to return the key stemsto their normal positions after each depression of a key, the upperedges of the forward portions of levers 17 normally engaging the bottomsof the kerfs in bar 16 at the forward edge of'the under side of saidbar, and the upper edges of the rear portions of said lev ers beingnormally spaced from the bottoms of the kerfs, as shown in Figs. 1 and2.

Each link 21 is formed with a rearwardly projecting lug 24 adjacent itslower end, to which the forward end of one of a series of links 25 isconnected. The points of connection of all of the links 25 with lugs 24on links 21 are in alignment transversely of the machine and coincidentwith the point fulcrum rod 27 which is secured at its endsv to the sidewalls 1 of the main frame part.

Each lever 26 is connected by a link 28 with one of a series of levers29 pivotally held at their lower ends to a common fulcrum rod 30 whichis secured at its ends to.- the side walls 1.of the stationary framepart. The levers 29 increase in length from the center toward eitherside of the machine, and each of said levers is connected at its upperend by a link 31 with a downwardly and rearwardly extending lug 32formed on its assoclated type-bar 32.

The type bars 32 are pivotally held at their rear ends in a type segment33 by a common pivot wire 34, and the forward ends of said type bars arenormally supported on a type rest 35 held to' the type segment by a pairof rods or bars 36. The typesegment is formed with end portions 37extending through and slidable vertically in slots 38 formed in twobrackets 39 which are held to the inner side of the rear wall 2 of themain frame part. The slots 38 are closed at the top and bottom to limitthe up-and-down movement of the se ment, and the lower edges of the endortions 37 of the segment normally rest at t e bottoms of the slots andsupport the segment in its normal lower case position. At the outersides of brackets 39 the end portions 37 are formed with stub shafts 40on each of which is mounted a roller 41.

Each type bar 32 is preferably provided with three characters, as shown,and the segment 33 is adapted to be shifted upwardly relativelydifferent distances to middle (or cap) case osition and upper (or fig.)case position. he middle-case shift key 42 is mounted on a key stem 43similar to the key stems 13, and the upper-case shift key 44 is mountedon a key stem 45 similar to the key stems 12. The key stems 43 and 45are each supported on the forward ends of pairs of superposed levers 14and 17 similar to levers 14 and 17, said levers being fulcrumed on rods15 and 18 and "the rear ends thereof being connected by vertical links21 similar to the links 21. with lugs similar to lugs 24 on links 21 towhich the forward ends of two links 46 and 47. are connected at pointsin alignment with the points of connection of links 25 with the lugs 24.Link 47 is pivotally connected with the lower end of a rock arm 48 fixedon a rock shaft 49 which is journaled at its ends in the side walls 1 ofthe stationary frame The links 21 are formed I part. Link 46 ispivotallyconnected with the lower end of a rock arm 50 fixed to a mally inengagement with each roller 41..

lit will be obvious that when shift key 42 is depressed the segment willbe moved up-.

Wardlyto vary the relation between the type bars 32 and the platen 54,and that when shift key 44% is depressed the segment will be movedupwardly a greater distance than that imparted through theinstrumentality of the key 42 and the cams 53 actuated thereby. Asuitable'spring (not shown) is provided to assist in returning thesegment to its normal position. i a

- The platen 5a is mounted on a carriage 55 traveling on a carriage bed56. The bed 56 is rigidly held at its ends to the rear ends of a pair orforwardly extending bars 58. The bed and bars form a substantiallyU-shaped frame for supporting the carriage and associated devices, andsaid bed and bars are preferably formed integrally, the bed being formedwith-depending portions 57 at its ends connected with the inner faces ofthe bars. The ends of the carriage bed 56 are parallelwith andpreferably a little inside the vertical plane of the inner faces of bars58. Bars 58 are slidably supported and guided in ways 59 which may be,formed by od-setting portions of the side walls 1, as shown, win anyother suitable manner. The ll-shaped frame formed by bed 56 and bars 58is normally held in 'a rearwa-rdly extended position, as shown in Figs.1'. and 4, to support the platen at-the rear and above the main framepart in cooperative relation with the type bars '32, and is adapted tobe locked in this position by clamping bolts 60 which.

extend through apertures in the side walls 3 and through elongatedhorizontal slots 61 in the bars 58. Suitable th'umbnuts 62 are threadedon the outer ends of the clamping bolts 60. I

Adjacent their forward ends bars 58- are each formed with a lateralextension or in wardly projecting bracket 63, on which brackets thespindles or shafts 6d of ribbon spools 65 are mounted. An escapementwheel 66 is journ'aled on a bracket 67 extendin upwardly at the rear ofthe platen and held at its forward end to the under side of the carriagebed 56. A universal bar 68 curved to conform with the arc of the segment33 is rigidly held to the forward ends of a pair of bars 69. The bars 69carrying the universal bar 68 aresupported to move forwardly andrearwardly by two pairs of rock arms 70 and 71 whose upper ends arerigidly held to rock shafts 70 and 71 journaled in suitable bearingsformed on the bracket 67. The universal bar 68 is nor mally held in theforwardly extended position shown in Fig. l by means'of a suitablespring, andis adapted to be engaged and moved rearwardly by the typebars 32 when the type bars are moved upwardly and rearwardly to theprinting point. Suitable mechanism, such as shown in the patent toLatta, No. 1,222,550, dated April 10, 1917, may be provided foroperating the carriage escape-ment and for feeding and vibrating theribbon, such mechanism being mounted on the ll-shaped frame part andoperatively connected with the universal bar 68. a

The space bar 72 is supported on the forward ends of three angle arms73, the vertically extending rear portions 73 of which are eachpivotally held to the forward ends of a pair of superposed parallellevers 7 1 and 75 similar to levers 14 and 17 supporting the key stems.The levers 74 and 75 of each pair are connected at their rear ends by avertical link 76 similar to links 21. The link 76 connecting the rearends of the central pair of superposed levers Hand 75 is formed with anear or lug 77 similar to lugs 24 on links 21, and the forward end of alink 78 similar to links 25 is pivotally connected with said lug 77 inalignment with the points of connection of the forward ends of links 25with lugs 24, and in alignment with the pivotal axis of the keyboardframe part 5. The link 78 is connected at its rear end, in the samemanner as links 25 are'connected with the type bars, with a blank typebar or universa'l bar-operating lever 79 pivotally supported midway ofthe type segment 33 on the fulcrum wire 34. The free end of the blanktype bar 79 normally rests onthe type bar rest 35. it will be obviousthat by, depressing the space bar the blank type bar will be movedupwardly and rearwardly and will actuate the universal bar toletterspace the carriage without printing.

The pivoted keyboard frame part 5 is operatively connected with thell-shaped horizontally slidable frame part which supports the carriage,platen, universal bar, ribbon mechanism and escapement mechanism, tomove the slidable frame along the guide-ways 59 when the keyboard framepart is shifted. The keyboard frame. and the ll-shaped frame are movablesimultaneously toward and from each other to and from their compacted orfolded positions through the medium of a pair of links 80 and a pair oflevers 81. The levers 81 are pivotally held intermediate their ends tothe side walls 1 of the stationary main frame p'art. The upper endsof'said levers have pin-and-slot connections 83 with the forward ends ofthe bars 58, and the lower ends of the levers are pivotally connected at84 with the rear ends of the links 80. The forward ends of links 80 arepivotally connected at 85 with the side walls of the keyboard frame part5 at a point above the pivot point 84 and above the pivot bolt 6 of thekeyboard frame part.

It will be obvious that the keyboard frame part may be folded upwardlyand rearwardly about pivots 6 from its normal forwardly extendedhorizontal position to a compact vertical position within the forwardpart of the main frame without any portion of the keyboard frameprojecting above the mainframe, andthat when the keyboard frame isfolded the bars 58 will be moved horizontally forward along the ways 59by links 80 and levers 81, thus moving the carriage, platen, universalbar, ribbon mechanism and escapement mechanism forwardly from theirnormal positions co-more compact positions over the type bars and closerto the keyboard. It will be observed also that the ribbon spools move toa compact position below the top plate 3 of the main. frame and abovethe plane of the type basket, into close relation with the lowest partof the keyboard, that the lower part of the keyboard is moved to acompact position in front of the ribbon spools and typebar rest, whilethe higher part is moved to a compact position below the type-bar rest,and that all of the parts mounted on the horizontally slidable framepart and the upwardly swinging frame part are brought within thevertical planes of the front and rear ends of the main frame partwithout increasing the height of the machine when folded. The variousparts of the machine are thus folded into very' compact relation and insuch a way that the machine when folded assumes" an elongatedrectangular form, with the more delicate parts, such as the carriage,ribbon mechanism, escapement mechanism, universal bar and type basket,in the same planes as they occupy when in their normal extendedoperative positions. By. this arrangement the cubical dimensions of themachine may be reduced approximately 50% and the folded machine may becarried in a conveniently portable, elongated. rectangular case with thebase of the main frame part resting on the bottom of the case, and withthe delicate mechanisms above specified in their normal planes, thusavoiding any tendency to strain or disarrange parts of said mechanismswhen the machine is carried in its enclosing case.

Any suitable or known means, such, for example, as integral hubs on thelevers or separate spacing sleeves on the fulcrum rods, may be employedfor spacing the levers 26 and 29 on their fulcrum rods 27 and 30. Itwill be obvious also that the locking bolts 60 and slots 61 may beomitted if desired.

What I claim is:

1. In a compactible typewriting machine, the combination of a relativelystationary frame part, a type segment supported thereon, a universal barsupported above the type segment, an upwardly and rearwardly movablelever fulcrumed in the type segment adapted to actuate the universalbar, a space bar, a rocking support for the space bar, a frame part onwhich said support is fulcrumed pivotally held to the stationary framepart to fold upwardly and rearwardly toward the universal bar, and apositive mechanical operating connection between the rear end of saidrocking support and said lever foldable at a point coincident with thepivotal axis of the foldable frame part.

2. In a compactible typewriting machine, the combination of a relativelystationary frame part, a type segment shiftably mounted in said framepart, type bars supported in said segment and movable therewith to varythe relation between the type bars and the printing point, a shift key,a rocking support for said shift key, a keyboard frame part on whichsaid support is fulcrumed intermediate its ends pivotally held to thestationary frame part to ;fold upwardly and rearwardly, and an operatingconnection between the rear end of the rocking support and the segmentfor shifting the segment when the key is operated, said connection beingfoldable at a point coincident with the pivotalaxis of the keyboardframe part.

3. In a compactible typewriting machine, the combination of a relativelystationary frame part, a type segment shiftably mounted in said framepart, type bars supported in said segment and movable therewith to varythe relation between the type bars and the printing point a shift key, arocking support for said shift key, a keyboard frame part on which saidsupport is fulcrumed intermediate its ends pivotally held to thestationary frame part to fold upwardly and rearwardly, a link pivotallyconnected with the rear end of said rocking support at a pointcoincident with the pivotal axis of the keyboard frame part, and meansconnected with the rear end of said link for shifting the segment whenthe key is operated.

4. In a compactible typewriting machine, the combination of a support, aplurality of type bars mounted thereon and normally lying insubstantially horizontal planes, a keyboard having a plurality of banksof keys foldable bodily from their normal operative positions topositions in which keys of the highest bank underlie the forward ends ofthe type bars and keys of the lowest bank are disposed in front of thetype bars, a platen carriage, means for moving the platen carriagesimultaneously with the keyboard from a normal operative position aboveand at the rear of the rear ends of the type bars to a compact positionin the same horizontal plane close to the lowest bank of keys of thefolded ke board and overlying the type bars, a pair of ribbon spoolssupported in front of the carriage to move therewith into close relationwith the forward part of the keyboard when the machine is compacted, anda universal bar movable with the carriage into and out of cooperativerelation with the type bars.

5. In a compactible typewritirfg machine, the combination of a platen,type bars, and foldable key-operated means for varying the relationbetween the platen and type bars for printing different case characters,said means embodying a support foldable upwardly and rearwardly towardthe platen and type bars, a shift key foldable with said support, arocking device fulcrumed intermediate its ends on said support andcarrying said key at its forward end, a link pivotally connected withthe rear end of said device at a point coincident with the point of foldof said support, and means connected with the rear end of said link forimparting a relative movement between the platen and type bars when thekey is depressed.

6. In a compactible typewriting machine, the combination of a framehaving a relatively stationary intermediate portion upon which certainof the working parts are mounted and portions movable relatively to saidintermediate portion upon Which other working parts are mounted, andconnections between said frame portions whereby the movable portions maybe shifted to move the working parts mounted thereon from normalposit1ons respectively fore and aft of the intermediate portion tocompact inoperativ positions within the vertical planes of the edges ofthe intermediate portion without increasing the height of the machine,the working parts on one of said movable portions being bodily shiftabletherewith out of cooperative relation with cooperating parts on thestationary portion and the working parts on the other movable portionhaving foldable constantly maintained operating connections with workingparts on the stationary portion.

7. In a compactible typewriting machine, the combination of a stationaryframe part, a keyboard having printing keys and shift and spacing keys,a platen, platen feeding and ribbon carrying means and a universal barassociated with the platen, type carriers mounted on the stationaryframe part operatively connected with the printing keys and adapted toactuate the universal bar,

means for varying the relation between the type carriers and platenmounted on the stationary frame part and operatively con-- nected withthe shift keys, means mounted on the stationary frame part andoperatively connected with the spacing key for actuatmachine, thecombination of a main frame part, a keyboard frame part pivotallyconnected at its rear end to the forward end of the main part, aplurality of key-operated levers fulcrumed on the key board frame part,type bars extending fore and aft of the machine operable bythe-key-operated levers mounted on the main frame part with theirforward ends at the rear of the keyoperated levers, a frame partslidably held to the main frame part to move forwardly and rearwardly, aplaten carriage mounted on the slidable frame part and normallyoverhanging the rear end of the main frame part, and connections betweenthe keyboard frame partand slidable frame part whereby the same may besimultaneously shifted to place the keyboard frame part and also thekey-operated levers in their entirety in compact vertical positionsclose to the forward ends of the type-bars and to place the platencarriage in a compact upright position overlying the type-bars.

9. In a compactible typewriting machine, the combination of a main framepart, typebars mounted in the main frame part and normally" extendingsubstantially fore and aft of said frame part, a keyboard frame partpivotally held to the main frame part to fold upwardly and rearwardly toan edge-wise position within the forward end of the mam frame part,key-operated devices mounted on the keyboard frame part, constantlymaintained foldable operating connections between the key-operateddevices and type bars, a platen support normally overhanging the rearend of the main frame part, and connections between the platen supportand keyboard frame part for shifting theplaten support to a compactposition overlying the type-bars when the keyboard frame part is swungto its compacted position.

10. In a compactible typewriting machine,

the combination of a main frame part, type bars mounted in the mainframe part, a frame part slidably held to the main frame part to moveforwardly and rearwardly, a platen carriage mounted on the slidableframe part and normally overhanging the rear end of the main frame part,a pair of ribbon spools mounted on the slidable frame part in front ofthe carriage, a key-board frame part pivotally held to the main framepart to fold upwardl and rearwardly to a vertical position in rout ofthe type-bars, stepped rows of keys operatively connected with the typebars foldable with the keyboard frame part into edgewise positions closeto the type-bars, and means operable by the upward and rearward movementof the pivoted keyboard frame part for moving the slidable frame partforwardly to place the ribbon'spools close to the upper end'of thefolded keyboard and above the rear rows of keys and place the platencarriage above the type-bars.

11. In 'a compactible front-strike typewriting machine, the combinationof a support, a plurality of type-bars mounted on the support, akeyboard arranged in substantially' the same horizontal plane with saidtype-bars having stepped transverse rows of keys for operating thetype-bars foldable to edgewise positions in which keys of the highestrow underlie the forward ends of the type bars and keys of the lowestrow are disposed in front of the type-bars, a platen carriage, and meanswhereby the platen carriage may be moved from a normal position beyondthe rear end of the support to a compact position overlying the typebars and closer to the lowest row of keys of the keyboard.

12. In a compactible frontstrike typewriting machine, the combination ofa support, a plurality of type-bars mounted on the support, a keyboardarran ed in substantially the same horizontal p ane with said type-barshaving stepped transverse rows of keys for operating the type-barsfoldable to edgewise positions in which keys of the highest row underliethe forward ends of the type bars and keys of the lowest row aredisposed in front of the type-bars, a platen carriage, and meansoperable by folding the keyboard for moving the carriage forwardly whileupright from a normal rearwardly extended position to a more compactposition over the type-bars.

13. In a compactible typewriting machine, the combination of a mainframe part1, printing instrumentalities mounted in the main frame part,a keyboard frame part pivotally held at its rear end to the forward endof the main frame part adjacent the base of the main frame part to swingupwardly and rearwardly to a vertical position, a plurality ofkey-operated devices supporting stepped banks of keys mounted on thekey-board frame part and foldable therewith in their entirety to placethebanks of keys in edgewise positions within the main frame part withcertain of the keys under the printing instrumentalities and others infront of the printing instrumentalities,

a platen carriage normally overhanging the rear end of the 'main framepart, a support for the carriage slidably held to the main frame part,and means operable by the keyboard frame part for sliding the carriagesupport forwardly when the keyboard frame part is swung upwardly.

14. In a compactible front-strike type-- writing machine, thecombination of a main frame part, type bars mounted on the main framepart, a foldable keyboard frame part hinged to the forward end of themain frame tween the keyboard frame part and carriage support for movingthe platen carriage and universal bar to compact positions over thetype-bars when the keyboard frame part is folded upwardly andrearwardly.

: l5.- In a compactible front-strike typewriting machine, thecombination of typebars a platen carriage normally supported at the rearof the type-bars, a keyboard nor mally supported forwardly of thetype-bars and in substantially the same horizontal plane therewith,means whereby the keyboard may be folded upwardly and rearwardly to acompact vertical position in close relation with the forward ends of.the type-bars, and means controlled by the folding movement of thekeyboard for moving the carriage to a compact position over thetype-bars.

16. In a compactible front-strike typewriting machine, the combinationof typebars, a platen carriage normally-supported at the rear of thetype-bars, a keyboard nor mally supported forwardly of the type-bars andin substantially the same horizontal plane therewith, means whereby thekeyboard may be folded upwardly and rearwardly to a compact verticalposition in close relation with the forward ends of the type-bars, andmeans controlled by the folding movement of the keyboard for moving thecarriage to a compact position-over the type-bars, means for limitingthe folding movement of the keyboard, and means for locking the keyboardand carriage in both their compacted and extended operative positions.

17. In a compactible typewriting machine, the combination of a mainframe part, type bars mounted on the main frame part and normallyextending substantially fore and aft thereof, key-operated leverssupporting keys arranged in transverse rows at different heights, and akeyboard frame part in which the key-operated levers are fulcrumedhinged at its rear end to the forward end of.

the main frame part at a point ad'acent the base of the main frame partan foldable to a vertical position in which certain of the keys arelocated below the type-bars and others in front of the type bars.

18. In a compactible typewritin'g machine, the combination of type-barskey-operated levers for operating the type bars normally extending foreand aft of the machine and .located Wholly forward of the type-bars, a

platen normally I located above and at the rear of the type-bars,and-means whereby the key-operated levers and platen may be shiftedrelatively to the type-bars to compact inoperative positions'in whichthe keyoperated levers are arranged in their entirety on end in front ofthe type-bars and the platen is arranged over the type-bars.

This specification signed this fifth day of March, A. D. 1919.

LEWIS B. BRIDGES.

